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external/mqtt/src/main/scala/org/apache/spark/streaming/mqtt/MQTTTestUtils.scala
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package org.apache.spark.streaming.mqtt | ||
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| import java.net.{ServerSocket, URI} | ||
| import java.util.concurrent.{TimeUnit, CountDownLatch} | ||
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| import scala.language.postfixOps | ||
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| import org.apache.activemq.broker.{BrokerService, TransportConnector} | ||
| import org.apache.commons.lang3.RandomUtils | ||
| import org.eclipse.paho.client.mqttv3._ | ||
| import org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence | ||
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| import org.apache.spark.streaming.{StreamingContext, Milliseconds} | ||
| import org.apache.spark.streaming.scheduler.StreamingListener | ||
| import org.apache.spark.streaming.scheduler.StreamingListenerReceiverStarted | ||
| import org.apache.spark.util.Utils | ||
| import org.apache.spark.{Logging, SparkConf} | ||
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| /** | ||
| * Share codes for Scala and Python unit tests | ||
| */ | ||
| private class MQTTTestUtils extends Logging { | ||
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| private val persistenceDir = Utils.createTempDir() | ||
| private val brokerHost = "localhost" | ||
| private var brokerPort = findFreePort() | ||
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| private var broker: BrokerService = _ | ||
| private var connector: TransportConnector = _ | ||
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| def brokerUri: String = { | ||
| s"$brokerHost:$brokerPort" | ||
| } | ||
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| def setup(): Unit = { | ||
| broker = new BrokerService() | ||
| broker.setDataDirectoryFile(Utils.createTempDir()) | ||
| connector = new TransportConnector() | ||
| connector.setName("mqtt") | ||
| connector.setUri(new URI("mqtt://" + brokerUri)) | ||
| broker.addConnector(connector) | ||
| broker.start() | ||
| } | ||
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| def teardown(): Unit = { | ||
| if (broker != null) { | ||
| broker.stop() | ||
| broker = null | ||
| } | ||
| if (connector != null) { | ||
| connector.stop() | ||
| connector = null | ||
| } | ||
| } | ||
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| private def findFreePort(): Int = { | ||
| val candidatePort = RandomUtils.nextInt(1024, 65536) | ||
| Utils.startServiceOnPort(candidatePort, (trialPort: Int) => { | ||
| val socket = new ServerSocket(trialPort) | ||
| socket.close() | ||
| (null, trialPort) | ||
| }, new SparkConf())._2 | ||
| } | ||
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| def publishData(topic: String, data: String): Unit = { | ||
| var client: MqttClient = null | ||
| try { | ||
| val persistence = new MqttDefaultFilePersistence(persistenceDir.getAbsolutePath) | ||
| client = new MqttClient("tcp://" + brokerUri, MqttClient.generateClientId(), persistence) | ||
| client.connect() | ||
| if (client.isConnected) { | ||
| val msgTopic = client.getTopic(topic) | ||
| val message = new MqttMessage(data.getBytes("utf-8")) | ||
| message.setQos(1) | ||
| message.setRetained(true) | ||
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| for (i <- 0 to 10) { | ||
| try { | ||
| msgTopic.publish(message) | ||
| } catch { | ||
| case e: MqttException if e.getReasonCode == MqttException.REASON_CODE_MAX_INFLIGHT => | ||
| // wait for Spark streaming to consume something from the message queue | ||
| Thread.sleep(50) | ||
| } | ||
| } | ||
| } | ||
| } finally { | ||
| client.disconnect() | ||
| client.close() | ||
| client = null | ||
| } | ||
| } | ||
|
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| /** | ||
| * Block until at least one receiver has started or timeout occurs. | ||
| */ | ||
| def waitForReceiverToStart(ssc: StreamingContext) = { | ||
| val latch = new CountDownLatch(1) | ||
| ssc.addStreamingListener(new StreamingListener { | ||
| override def onReceiverStarted(receiverStarted: StreamingListenerReceiverStarted) { | ||
| latch.countDown() | ||
| } | ||
| }) | ||
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| assert(latch.await(10, TimeUnit.SECONDS), "Timeout waiting for receiver to start.") | ||
| } | ||
| } |
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